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2021 Honda Civic
2021 Honda Civic sedan coolant type and capacity for the 1.5 L and 2.0 L engines, including the reserve-tank remainder.
Difficulty, time, and cost are estimates when this guide gives them. Torque is a cited figure, or it is left off.
Main source: 2021 Civic Sedan Owner's Manual, engine coolant and specifications (opens in a new tab), American Honda Motor Co., Inc., published 2020-08-25, read 2026-10-15.
Numbers on this page come from the cited source. Match the engine before you use a capacity or a torque. Do not work under a vehicle held only by a jack.
Honda Long-Life Antifreeze/Coolant Type 2
The manual says this coolant is already premixed. Do not add straight antifreeze or water.
| Item | Figure | Where it comes from |
|---|---|---|
| Specified coolant | Honda Long-Life Antifreeze/Coolant Type 2. Premixed 50 percent antifreeze and 50 percent water. Specification ratio 50/50 with distilled water. | Engine coolant section and both specification pages |
| 2.0 L capacity | 1.4 US gal (5.32 L), change including the remaining 0.2 US gal (0.75 L) in the reserve tank. | 2.0 L engine specifications |
| 1.5 L capacity | 1.34 US gal (5.09 L), change including the remaining 0.2 US gal (0.75 L) in the reserve tank. | 1.5 L engine specifications |
| Freeze protection | About -31 F (-35 C) for the genuine 50/50 mixture. Colder climates need a dealer to raise the concentration. | Engine coolant notice |
Make sure the engine and radiator are cool. If the level is below MIN, add the specified coolant until it reaches MAX, then inspect for leaks.
The adding steps, illustrated for both engines, say to turn the cap 1/8 turn to relieve pressure, push down and turn to remove it, pour to MAX, and tighten the cap. Pour slowly and clean spills.
The 2.0 L change capacity is 1.4 US gal (5.32 L). The 1.5 L change capacity is 1.34 US gal (5.09 L). Both include the 0.2 US gal (0.75 L) remaining in the reserve tank. This page does not convert gallons to quarts.
The two capacities differ by a small amount. They are printed on separate engine pages in the sedan manual, so they stay on separate rows.
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Part
Honda Long-Life Antifreeze/Coolant Type 2
Premixed 50/50. The notice says the genuine mixture withstands freezing to about -31 F (-35 C).
Civic sedan coolant specification (opens in a new tab)Search Amazon.com (affiliate link) (opens in a new tab)
Tool
Honda Long-Life Antifreeze/Coolant Type 2
The manual says this coolant is already premixed. Do not add straight antifreeze or water.
2021 Civic sedan coolant section (opens in a new tab)Search Amazon.com (affiliate link) (opens in a new tab)
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These guides cover the same kind of work. Their numbers belong to those vehicles, not to this one.